Freestyle Please help with pump tuning on my big bore SN

A

adubaz7

Location
az
I am looking for some suggestions for my setup.
I have a 62t bottom with 61x top re sleeved to a 771 big bore freestyle ported it also has v-force reeds and dual 44mm buckshot carbs I am running a protec pipe also.

So this is what I am looking for suggestions to I just put on a hooker 11-17 and it works amazing the ski rips hard and mid and top end pull like crazy with good bottom as well but I would like to see if maybe I can get some more bottom as a trade for some top end as it is more than I need. I believe installing a pump cone will give more bottom but I am unsure how much of a change this will make I have also read that boring the nozzle will increase bottom with a bit less top speed. As of now I am running stock nozzle (just under 82mm) and stock pump cone please let me know your thoughts for my setup.
 
A

adubaz7

Location
az
I put on a stock nozzle from a waveblaster it is aluminum can I use that to get bored out to 85 or do I need an aftermarket nozzle also is the bored nozzle a big change or hardly noticeable
 
A

adubaz7

Location
az
I believe I read 85.5 is the biggest you can go on my style nozzle can someone confirm this also can someone who has done this mod explain the change it made to there setup
 
A

adubaz7

Location
az
piratelife said:
WOW really! I wouldnt!
Click to expand...
Same here it is pretty cheap to just have it bored


I believe I read 85.5 is the biggest you can go on my style nozzle can someone confirm this also can someone who has done this mod explain the change it made to there setup
 
Aircraftsalz

Aircraftsalz

Thrust built Dasa Power
Location
Off site
Bore the nozzle to 85 I know chris sells these pretty cheap or send yours to #.Zero.... While you have it off put a stubby cone on there... Playing with reduction bore, steering nozzle bore , & pump cone size really helps with the fine tuning of a pump/prop combo

If you do the nozzle , etc and need a little more bottom you can install a washer behind the prop to space it forward, this will unload the pump a little on the bottom end and help the motor spin right off the bottom...
 
A

adubaz7

Location
az
Well I got my nozzle bored to 85 from 82.5 stock and was pretty surprised in change it made it is definately noticable and closer to what I am looking for. I am going to play a bit with my pipe setup still I have an old original protec pipe on there right now and the thing rips top end but I am sure that I am giving up alot on the bottom with this pipe I have another setup that I will be trying out soon thanks for your help and I will post up my findings if I decide to change to a stubby cone as well.
 
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